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Principles  In Stereochemistry
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Principles In Stereochemistry

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lecture 1 & 2

lecture 1 & 2

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  • 1. Principles in STEREOCHEMISTRY Prof.Dr Adel Selem By: Mahmoud Galal Zidan
  • 2. Lecture 1
  • 3. Historical Background •
  • 4.
  • 5. Acidimetric carbon atom which attached with four different function• 2-butanol
  • 6. • 2 Cl – Butane • Lactic acid (2-Hydroxypropionic acid ) Isomerism 2n where n is the no of athemetric Carbon Carbon not athemetric because of C=O
  • 7. Pair of enantiomers • Are two optically active isomers each one is the mirror image of the other • They have identical properties • One of them rotate the light to the right an another rotate the light to the left
  • 8. Racemic Mixture • When two enantiomers are mixed together a rotation caused by a molecule of one isomer is exactly canceled by an equal and opposite rotation caused by a molecule of its enantiomer • Or it’s the mixture of equal amount of optical inactive .
  • 9. Compound containing one asymmetric carbon atom • Glyceraldehyde C3H6O3 ( CnH2nOn )
  • 10. Compound containing two dissimilar asymmetric carbon atom• aldoTetriose OH In right  D OH In left  L
  • 11. Diastereomers (1,4) . (2,3) one of the is not mirror image to other but they are non super possible – they have different physical properties . • 2,3 dichloropentane • Amino Acid ( alanine )
  • 12. Compound containing two similar asymmetric carbon atom • 2,3 dichloropentane
  • 13. • Aldopentose
  • 14. Lecture 2
  • 15. Absolute Configuration • Chloro Bromo Iodo Methane • Mesoform : is the isomers containing plane of symmetry Plane of symmetry
  • 16. • Glyceraldehyde
  • 17. • Aldo Tetrose • Tartaric acid
  • 18. • Aldopentose
  • 19. Racemic Mixture • Formation of ( Cyano hydrides ) • Formation of ( α – halo acid )
  • 20. • Malonic Ester
  • 21. • Ethyl acetate

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